Question: What does frequency measure and what is a similar measurement to it?
Paraphrase: Explain what frequency measures and list a measurement that is closely linked to it?
SPARQL (Wikidata): SELECT ?ans_1 ?ans_2 WHERE { wd:Q11652 wdt:P1880 ?ans_1 . wd:Q11652 wdt:P460 ?ans_2 }